Focal Bomba 27 VI User Manual
BOMBA 27 V1
User Manual
Congratulations on choosing Focal automobile speakers. To gain the best results
from your speakers, please ensure you follow these recommendations, and keek
carefully this user manual so that you can consult it later. If not followed correctly
any fault observed may not be covered by the guarantee.
Precautions
For the subwoofer to perform at its best, we recommend to use it in a location where temperature
doesn’t go below 5°C.
• The location must also be dry and offer adequate ventilation.
• The supply voltage requirement is 12VDC (13.8VDC) with the negative connection grounded.
Please make sure that the characteristics of your vehicle correspond with this requirement
before connecting the equipment.
• For safe driving, we recommend that you operate your sound equipment at a listening level
that does not conceal traffic noise.
Warning!
The performance of the Focal BombA 27 V1 allows high sound pressure levels to be generated.
We remind you that sustained listening beyond 110dB SPL can permanently and irreversibly
damage your hearing. We recommend that you adjust the level of your equipment correspondingly.
For safety reasons, it is essential that you securely fix the subwoofer enclosure in the boot
(make sure you do not drill through the petrol tank if you fix it with screws).
Français page 6
Mounting kit included:
• 2 x nylon straps
• 4 x metal roll bar
• 8 x fixing screws
• 1 x template
THE FOCAL GUARANTEE ONLY APPLIES IF PAGE 12 IS
RETURNED TO US WITHIN 10 DAYS OF PURCHASE.
Focal® is a trademark of Focal-JMlab® - BP 374 - 108, rue de l'Avenir - 42353 La Talaudière
cedex - France - Tel. (+33) 04 77 43 57 00 - Fax (+33) 04 77 43 57 04 - www.focal-fr.com
Due to constant technological advances, Focal reserves its right to modify specifications without notice. Images may not conform exactly to specific product.
BOMBA 27 V1
User Manual
Mounting
A power supply kit dedicated to the BombA cabling will shortly be available at your supply.
• Unplug the “+” from the battery.
• Make sure you follow the car manufacturer instructions (airbag, alarm system,
computer,immobiliser ...).
• Always use battery lead connections.
Cable routing
The 12V supply cables should be passed down one side of the vehicle and the signal cables
down the other. These cables must be suitably protected to avoid any damage to the insulation,
especially when feeding the cable through from the engine compartment to the passenger
cabin.
2
Power supply
(+) The 12V cable must be connected to the battery with a cable of appropriate quality and
size, 8mm
(16”) away from the battery.
(-) The ground wire must be connected to the chassis of your vehicle with a perfect electrical
connection (remove some paint to reveal bare metal if necessary) and with a cable of the
same specification as used for the + feed.
Connect the remote cable to the electrical aerial output or to the remote output of your radio.
Low level input (RCA) ➀
Connect to the RCA output of the radio.
High-level input ➁
Connect to the loudspeaker outputs of the radio.
Never connect the RCA and the high-level inputs together.
Adjusting the Volume
The volume setting allows you to match the level of the BombA with the level of the front
system. Setting:
• Turn the gain on the BombA down completely.
• Turn the radio up to a normal listening level.
• Turn the gain ➂ up on the BombA until you get the required balance.
Bass-boost
3 settings:
• Classic
• Techno
• Pop
➆
2
(7AWG). Protect the installation with a 30A fuse on this cable fitted less than 40cm
➂
➃
Note that these settings should be used together with the level adjustment.
BOMBA 27 V1
User Manual
Phase inverter ➄
It allows you to phase the subwoofer (generally advised) or unphase it.
The right setting is determined by listening and finding the one (matching with the front system) that provides the most bass.
3
Adjustable cut-off frequency
An electronic crossover removes medium and high frequencies beyond a point set by the user.
The ideal is to extend the bass frequencies in an even and continuous manner from where the
front system rolls off. In general, a cut-off frequency located between 80 and 100Hz should
be suitable for most systems.
This setting becomes more critical when the BombA is used within a high-end hi-fi system.
The idea cut-off frequency will only be found after extensive listening to a wide range of
musical.
Warning!
Very few recordings possess real bass frequencies. Bass notes such as those found in Rock,
Techno, Ragga music etc. are rarely located within the extreme bass area, but more likely in
the high bass band.
As a consequence, it is recommended to select a cut-off frequency between 100 and 120Hz
for these styles of music. However, you may prefer a lower cut-off frequency for classical
music.
It is possible to set the cut-off frequency anywhere between 40 and 160Hz.
This adjustment should be made in reference to the listening position and with your preferred
type of music.
For a more precise adjustment, your retailer may use an analyzer (RTA).
Dimensions :
➅
A = 12-3/16” - 310mm
B = 14-5/8” - 371mm
C = 6-11/16” - 170mm
L = 18-1/3” - 466mm
BOMBA 27 V1
User Manual
Amplifier setting and connections
4
Low level inputs
(4V compatible)
Phase settings
(o°/180°)
Guide
SPL
+
➀
➂
➄
Extreme Bass
+
Integrated Subsonic Filter 24dB/oct
Quality …
+
➁
- Classical
- Techno
- Pop
➃
➅
High level imputs
for compatibility
with all types of installation
3 bass-boost settings
Adjustable cut-off
at 18dB/oct
➆
Protection fuse
40 - 160Hz
Power
Issue Cause Solution
Can’t switch on the
BombA
The BombA is on,
but no signal
Output distorted Source level too high
Fuses blown Output levels too high Turn the volume down
No +12V on the supply
Ground not properly connected
Fuse broken
No signal
No remote
Level control ineffective
Gain of the amplifier too high
Check connections to battery
Check connection
Change fuse
Check signal cable
Check power on the remote
Turn up the volume on the source.
Turn down the source level
Turn down the gain of the amplifier
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